I went to holosun after a long time of researching reviews from credible sources, and cost considerations. If I were LE or back in the military or contracting id go eotech or acog, for durability and so on. I switched from an lvpo as my bedside AR is being used for more self defensive purposes and training/plinking at the range, and wanted a faster sight acquisition, less of an obstructed view, and tossed a maginifier on for aging eye sight for shots of a longer nature and positive ID.
There are many many options out there.
It may take you buying a couple items and playing with what you find to be the fit for you and your wants. If this is your case I would say look into monstrum tactical as they have red dots, prism sights, lvpo, that are very budget oriented that you can expiermemt with to slim down the field. I dont know that I'd use them as anything more than for range and practice purposes, I do have some of thier products on play toys and knock on wood never had an issue with anything from them, quad rails, cantelever scope mounts, scopes, prisim sight, stocks, foregrips, etc. But I dont know that I'd go so far as to say they would be life safety dependant.
Just my $.02